Write Joule’s law of heating.

Joule’s law of heating

Heat produced in a resistor is

1. directly proportional to the square of current for a given resistance,
2. directly proportional to the resistance for a given current and
3. directly proportional to the time for which the current flows through the resistor

H = I2Rt

where,

• H = Heat produced
• I = current
• R = Resistance of the conductor
• t = Time for which the current flows through the resistor